215261116 has 36 divisors (see below), whose sum is σ = 450068808. Its totient is φ = 89758368.

The previous prime is 215261107. The next prime is 215261119. The reversal of 215261116 is 611162512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215261119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7590 + ... + 22093.

Almost surely, 2^215261116 is an apocalyptic number.

It is an amenable number.

215261116 is an abundant number, since it is smaller than the sum of its proper divisors (234807692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215261116 is a wasteful number, since it uses less digits than its factorization.

215261116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29738 (or 29729 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 215261116 is about 14671.7795784969. The cubic root of 215261116 is about 599.3150665560.

The spelling of 215261116 in words is "two hundred fifteen million, two hundred sixty-one thousand, one hundred sixteen".